基于空时极化处理的机载雷达非平稳杂波抑制方法  

Airborne radar non-stationary clutter suppression method based on space-time-polarization processing

作　　者：杨志成 田步秋 陈威 谢文冲[1] YANG Zhicheng;TIAN Buqiu;CHEN Wei;XIE Wenchong(Air Force Early Warning Academy,Wuhan 430019,China)

机构地区：[1]空军预警学院,武汉430019

出　　处：《空天预警研究学报》2024年第4期235-240,共6页JOURNAL OF AIR & SPACE EARLY WARNING RESEARCH

基　　金：湖北省自然科学基金(JCZRQN202401172)。

摘　　要：针对传统方位-多普勒域空时自适应处理(STAP)方法无法区分不同模糊距离单元的杂波,难以有效抑制近程非平稳杂波的问题,提出了基于空时极化处理的机载雷达非平稳杂波抑制方法.该方法在俯仰-方位-多普勒3D-STAP方法的基础上引入回波的极化维信息,然后对回波信号进行极化-俯仰-方位-多普勒四维联合空时极化自适应处理.仿真结果表明,相对于传统方位-多普勒域STAP方法和俯仰-方位-多普勒3D-STAP方法,本文所提方法可更有效地实现对非平稳杂波的抑制.The traditional azimuth-Doppler domain space-time adaptive processing(STAP)method is unable to distinguish the clutter of different ambiguous distance units,and thus it is difficult to effectively suppress the short-range non-stationary clutter.In order to solve the aforementioned problem,this paper proposes a non-stationary clutter suppression method for airborne radar based on space-time-polarization processing.The method introduces the polarization dimension information of the echo on the basis of the pitch-azimuth-Doppler 3D-STAP method,and then performs the polarization-pitch-azimuth-Doppler 4D joint spatial polarization adaptive processing on the echo signal.The simulation results show that compared with the traditional azimuth-Doppler domain STAP method and the pitch-azimuth-Doppler 3D-STAP method,the proposed method can realize the suppression of non-stationary clutter more effectively.

关 键 词：机载雷达 空时极化自适应处理 非平稳杂波 

分 类 号：TN959.73[电子电信—信号与信息处理]